11717178845 has 4 divisors (see below), whose sum is σ = 14060614620. Its totient is φ = 9373743072.

The previous prime is 11717178829. The next prime is 11717178883. The reversal of 11717178845 is 54887171711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5198554201 + 6518624644 = 72101^2 + 80738^2 .

It is a cyclic number.

It is not a de Polignac number, because 11717178845 - 2⁴ = 11717178829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11717178793 and 11717178802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171717880 + ... + 1171717889.

It is an arithmetic number, because the mean of its divisors is an integer number (3515153655).

Almost surely, 2^11717178845 is an apocalyptic number.

It is an amenable number.

11717178845 is a deficient number, since it is larger than the sum of its proper divisors (2343435775).

11717178845 is an equidigital number, since it uses as much as digits as its factorization.

11717178845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343435774.

The product of its digits is 439040, while the sum is 50.

The spelling of 11717178845 in words is "eleven billion, seven hundred seventeen million, one hundred seventy-eight thousand, eight hundred forty-five".